
Fast Ethernet Controller (FEC)
Freescale Semiconductor
19-23
19.4.22 Receive Descriptor Ring Start Register (ERDSR)
ERDSR points to the start of the circular receive buffer descriptor queue in external memory. This pointer
must be 32-bit aligned; however, it is recommended it be made 128-bit aligned (evenly divisible by 16).
This register is not reset and must be initialized prior to operation.
19.4.23 Transmit Buffer Descriptor Ring Start Registers (ETSDR)
ETSDR provides a pointer to the start of the circular transmit buffer descriptor queue in external memory.
This pointer must be 32-bit aligned; however, it is recommended it be made 128-bit aligned (evenly
divisible by 16). You should write zeros to bits 1 and 0. Hardware ignores non-zero values in these two bit
positions.
This register is undefined at reset and must be initialized prior to operation.
Address: 0xFC03_0150
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
R_FSTART
0
0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0
0
0
Figure 19-21. FIFO Receive Start Register (FRSR)
Table 19-25. FRSR Field Descriptions
Field
Description
31–11
Reserved, must be cleared.
10
Reserved, must be set.
9–2
R_FSTART
Address of first receive FIFO location. Acts as delimiter between receive and transmit FIFOs. For proper
operation, ensure that R_FSTART is set to 0x48 or greater.
1–0
Reserved, must be cleared.
Address: 0xFC03_0180
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R
R_DES_START
0
0
W
Reset — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Figure 19-22. Ethernet Receive Descriptor Ring Start Register (ERDSR)
Table 19-26. ERDSR Field Descriptions
Field
Description
31–2
R_DES_START
Pointer to start of receive buffer descriptor queue.
1–0
Reserved, must be cleared.
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...